Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of setting a power of a secondary device-to-device synchronization signal, SD2DSS, by a first wireless device to enable a second wireless device to synchronize timing of the second wireless device to a timing derived from the first wireless device, the method comprising: determining power of a primary device to device synchronization signal, PD2DSS, transmitted by the first wireless device; and setting the power of the SD2DSS to be less than the power of the PD2DSS, the SD2DSS being transmitted with a power less than the PD2DSS as determined by a power offset compared to the PD2DSS.
A first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device. The first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits. The power of the SD2DSS is set to be less than the power of the PD2DSS, with the SD2DSS transmitted at a power level determined by a power offset compared to the PD2DSS. This offset ensures the SD2DSS is always weaker than the PD2DSS.
2. The method of claim 1 , wherein the PD2DSS includes a Zadoff-Chu, ZC, sequence and the SD2DSS includes an M sequence.
In the method described in claim 1, where a first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device and the first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits, with the power of the SD2DSS set to be less than the power of the PD2DSS, the PD2DSS uses a Zadoff-Chu (ZC) sequence, while the SD2DSS uses an M sequence for signal generation.
3. The method of claim 1 , wherein the power of the SD2DSS is the minimum of a nominal value of the power of the PD2DSS and a power threshold.
In the method described in claim 1, where a first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device and the first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits, with the power of the SD2DSS set to be less than the power of the PD2DSS, the power of the SD2DSS is set to the smaller of two values: a nominal power value based on the PD2DSS power, and a pre-defined power threshold. This ensures the SD2DSS power doesn't exceed a certain limit.
4. The method of claim 1 , wherein the set power of the SD2DSS is adjusted only when the power of the first signal exceeds a predetermined amount.
In the method described in claim 1, where a first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device and the first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits, with the power of the SD2DSS set to be less than the power of the PD2DSS, the power of the SD2DSS is only adjusted if the power of the PD2DSS exceeds a predetermined level. This avoids unnecessary adjustments when the PD2DSS signal is already weak.
5. The method of claim 1 , wherein a same circuitry generates the SD2DSS and a secondary synchronization signal, SSS.
In the method described in claim 1, where a first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device and the first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits, with the power of the SD2DSS set to be less than the power of the PD2DSS, the same circuitry within the wireless device is used to generate both the SD2DSS and a secondary synchronization signal (SSS). This simplifies the hardware design.
6. The method of claim 1 , wherein the power offset is −4 dB.
In the method described in claim 1, where a first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device and the first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits, with the power of the SD2DSS set to be less than the power of the PD2DSS, the power offset between the PD2DSS and SD2DSS is a fixed value of -4 dB. This means the SD2DSS is always 4 dB weaker than the PD2DSS.
7. The method of claim 1 wherein the power offset is determined autonomously by the first wireless device.
In the method described in claim 1, where a first wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that a second wireless device can synchronize its timing to the first wireless device and the first device determines the power of a primary device-to-device synchronization signal (PD2DSS) that it transmits, with the power of the SD2DSS set to be less than the power of the PD2DSS, the power offset is determined automatically by the first wireless device based on current conditions. This dynamic adjustment allows for optimization based on the environment.
8. A wireless device configured to set a power of a secondary device-to-device synchronization signal, SD2DSS, to enable a second wireless device to synchronize timing of the second wireless device to a timing of the wireless device, the wireless device comprising: a processor; and a memory, the memory containing instructions executable by the processor, the instructions when executed configure the processor to: determine power of a primary device to device synchronization signal, PD2DSS transmitted by the wireless device; and set the power of the SD2DSS to be less than the power of the PD2DSS, the power of the SD2DSS being transmitted with a power less than the PD2DSS as determined by a power offset compared to the PD2DSS.
A wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing. The device has a processor and memory. The memory contains instructions that, when executed, cause the processor to determine the power of a primary device-to-device synchronization signal (PD2DSS) transmitted by the device. The processor then sets the power of the SD2DSS to be less than the power of the PD2DSS. The SD2DSS's power is determined by a power offset relative to the PD2DSS.
9. The wireless device of claim 8 , wherein the PD2DSS includes a Zadoff-Chu, ZC, sequence and the SD2DSS includes an M sequence.
The wireless device described in claim 8, where the device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing, determines the power of a primary device-to-device synchronization signal (PD2DSS), and sets the SD2DSS power to be less than the PD2DSS power, uses a Zadoff-Chu (ZC) sequence for the PD2DSS and an M sequence for the SD2DSS.
10. The wireless device of claim 8 , wherein the power of the SD2DSS is a minimum of a nominal value of the power of the PD2DSS and a power threshold.
The wireless device described in claim 8, where the device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing, determines the power of a primary device-to-device synchronization signal (PD2DSS), and sets the SD2DSS power to be less than the PD2DSS power, sets the power of the SD2DSS to the minimum of two values: a nominal value based on the PD2DSS power and a fixed power threshold.
11. The wireless device of claim 8 , wherein the power offset is determined autonomously by the wireless device.
The wireless device described in claim 8, where the device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing, determines the power of a primary device-to-device synchronization signal (PD2DSS), and sets the SD2DSS power to be less than the PD2DSS power, autonomously determines the power offset used to set the SD2DSS power.
12. The wireless device of claim 8 , wherein the power offset is one of configurable and predetermined.
The wireless device described in claim 8, where the device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing, determines the power of a primary device-to-device synchronization signal (PD2DSS), and sets the SD2DSS power to be less than the PD2DSS power, has a power offset that is either configurable or predetermined. Configurable means it can be changed, predetermined means it's fixed.
13. A wireless device configured to set a power of a secondary device-to-device synchronization signal, SD2DSS, to enable a second wireless device to synchronize timing of the second wireless device to a timing of the wireless device, the wireless device comprising: a signal power determiner module configured to determine power of a primary device to device synchronization signal, PD2DSS; and an SD2DSS power setting module configured to set power of the SD2DSS to be less than the power of the PD2DSS, the power of the SD2DSS being a minimum of a nominal value of the power of the PD2DSS and a power threshold.
A wireless device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing. It includes a signal power determiner module that determines the power of a primary device-to-device synchronization signal (PD2DSS). An SD2DSS power setting module sets the power of the SD2DSS to be less than the power of the PD2DSS. The SD2DSS power is the minimum of a nominal value based on the PD2DSS power and a power threshold.
14. The wireless device of claim 13 , wherein the PD2DSS includes a Zadoff-Chu, ZC sequence and the SD2DSS includes an M sequence.
The wireless device described in claim 13, where the device sets the power of a secondary device-to-device synchronization signal (SD2DSS) so that another wireless device can synchronize its timing and includes modules to determine PD2DSS power and set SD2DSS power to be less than PD2DSS, uses a Zadoff-Chu (ZC) sequence for the PD2DSS and an M sequence for the SD2DSS.
15. A method of determining and transmitting one of a power offset and a power threshold to a wireless device, the method comprising: determining at least one of a power offset and a power threshold for setting a power of a secondary device to device synchronization signal, SD2DSS, by a wireless device, the SD2DSS being transmitted with a power less than a primary device to device synchronization signal, PD2DSS, as determined by a power offset compared to the PD2DSS; and transmitting at least one of the power offset and the power threshold to the wireless device.
A method determines and transmits a power offset or a power threshold to a wireless device. The method determines the power offset or power threshold, which the wireless device will use to set the power of a secondary device-to-device synchronization signal (SD2DSS). The SD2DSS is transmitted with a power less than a primary device-to-device synchronization signal (PD2DSS), as determined by a power offset compared to the PD2DSS. The determined power offset or threshold is then transmitted to the wireless device.
16. A network node, comprising: a processor; a memory containing instructions that when executed by the processor configure the processor to determine at least one of a power offset and a power threshold for setting a power of secondary device to device synchronization signal, SD2DSS by a wireless device; a communication interface configured to transmit at least one of the power offset and the power threshold to the wireless device, the power of the SD2DSS being transmitted with a power less than a primary device to device synchronization signal, PD2DSS, as determined by the power offset compared to the PD2DSS; and the memory configured to store the at least one of the power offset and the power threshold.
A network node includes a processor, memory, and a communication interface. The memory stores instructions that, when executed by the processor, cause the processor to determine a power offset or power threshold for setting the power of a secondary device-to-device synchronization signal (SD2DSS) by a wireless device. The communication interface transmits the power offset or threshold to the wireless device. The SD2DSS power is less than the primary device-to-device synchronization signal (PD2DSS) power, determined by the power offset. The memory also stores the power offset or threshold.
17. A network node, comprising: a power offset determiner module configured to determine a power offset to be used by a wireless device, to set a secondary device to device synchronization signal, SD2DSS; and a power threshold determiner module configured to determine a power threshold to be used by the wireless device to determine whether to set a power of the SD2DSS, the power of the SD2DSS being transmitted with a power less than the PD2DSS as determined by a power offset compared to the PD2DSS.
A network node includes a power offset determiner module and a power threshold determiner module. The power offset determiner module determines a power offset to be used by a wireless device to set the secondary device-to-device synchronization signal (SD2DSS). The power threshold determiner module determines a power threshold to be used by the wireless device to determine whether to set the power of the SD2DSS. The SD2DSS power is less than the PD2DSS power, as determined by a power offset.
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October 31, 2017
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